package com.huilang.demo1;

public interface SDCard1 {
    String readSD();
    void writeSD(String sd);
}

class SDCardImpl1 implements SDCard1 {


    @Override
    public String readSD() {
        return "readSD";
    }

    @Override
    public void writeSD(String sd) {
        System.out.println("writeSD: " + sd);
    }
}